Digital panel voltmeters help you to visually monitor the performance of industrial control machinery. They provide accurate readings for applications that require a precise digital readout of AC as well as DC voltages. Digital panel voltmeters are widely used for industrial, laboratory and office service applications. Their compact size makes them perfect for use in high-end consumer electronics and other products that need accurate line monitoring. They are vibration and moisture proof. This allows them to function well in harsh environments. Plug the digital device into any socket outlet and you can instantly read the voltages given.